Comparison

LunaLock vs Domain Checker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

LunaLock

Features
Read full description

LunaLock is the period tracker that actually keeps your data private. No cloud sync. No accounts. No data collection. Your period data stays on your device, period. Unlike other period apps that upload your most personal health data to remote servers, LunaLock was built from the ground up with one principle: your data never leaves your phone. FREE FEATURES: - Log period start and end dates with haptic feedback - Smart cycle prediction with confidence ranges (not just averages) - Track 6 common symptoms: cramps, bloating, headache, fatigue, acne, mood swings - Log your daily mood with 6 mood options - Record flow level from spotting to heavy - Calendar view with period and prediction markers - FaceID and PIN lock with emergency shake-to-lock - Auto-lock timer for extra security - Period reminders with customizable advance notice - Onboarding privacy promise - Delete all data anytime - No ads, no accounts, no tracking PRO FEATURES (one-time $3.99 purchase): - Trend charts for cycle length, symptom frequency, and mood patterns - Data export as PDF for doctor visits or JSON for other apps - Home screen widget with countdown and cycle day - 5 beautiful color themes (Luna, Rose, Ocean, Forest, Sunset) - HealthKit write-only integration (optional) - Monthly and annual cycle reports - Emergency shake-to-lock - All future updates included WHY LUNALOCK? Other period apps like Flo and Clue require accounts, collect your data, and use subscriptions. LunaLock is different: - $3.99 once, not $4.99/month forever - Zero data collection - we literally cannot see your data - FaceID lock means even someone borrowing your phone cannot see your period info - Emergency shake-to-lock for when you need instant privacy LunaLock. Your period. Your phone. Nobody else's.

About

Domain Checker

This app provides comprehensive domain diagnostics for developers and administrators. It offers quick analysis of DNS records, SSL certificates, HTTP responses, WHOIS information, and email security configurations from a single interface.

Highlights
  • DNS record lookup
  • SSL certificate inspection
  • HTTP response analysis
  • WHOIS domain information
  • Email security check
  • All-in-one domain diagnostics
Features
Read full description

Domain Checker brings DNS, SSL/TLS, HTTPS, registration data, and email security checks into one local-first workspace for developers, sysadmins, and network engineers. LOCAL-FIRST ARCHITECTURE • 100% local capacity available: domains and checks stay on your device • Fast manual or automated refresh with offline backup and restore • Full access to standard diagnostics without cloud dependencies OPTIONAL CLOUD MONITORING • Automatic 24/7 background checks with instant outage and expiry alerts • Standard tier includes 50% cloud concurrency; PRO unlocks full 100% • Opt-in per domain anytime; zero automatic uploads CORE PROTOCOL DIAGNOSTICS • DNS: A, AAAA, CNAME, MX, TXT, NS, SOA, and CAA records • TLS: Certificates, full trust chains, expiration, SANs, and cipher suites • HTTPS: Status codes, redirect chains, latency, and reachability • WHOIS / RDAP: Registrars, status flags, and expiry timelines • Email Security: MX routing, SPF validation, and DMARC policies PRO ADVANCED SUITE (ONE-TIME PURCHASE) • Anycast DNS Propagation: Compare answers and TTLs across global public resolvers • DNSSEC Trust Chain: Verify DS, DNSKEY, and RRSIG signature validity • Lifecycle Planning: Sync expiration dates to Apple Calendar and Reminders • Security Hygiene: Detect dangling CNAME takeovers and wildcard DNS drifts • Full Cloud Concurrency: Maximize 100% cloud monitoring across all slots • Exportable PDF Reports: A4 diagnostic summaries and remediation priorities BUILT FOR iOS & iPadOS • Deep sapphire theme optimized for night-shift operations • Home Screen and Lock Screen widgets for at-a-glance fleet status • Localized in 9 languages Terms: https://domain.opshome.run/terms/ Privacy: https://domain.opshome.run/privacy/ EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

LunaLock4 screens
Domain Checker4 screens

Verdict

The call

LunaLock and Domain Checker are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. LunaLock sells 1 one-off in-app purchase and Domain Checker sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
LunaLock versus Domain Checker: the parameters behind the verdict, then further details
ParameterLunaLockDomain Checker
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequency—Weekly
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS1717.0
Further details — not scored
Size3 MB9 MB
Age rating9+4+
Developer贺 周超 张

In-app purchases

1 purchases

LunaLock

One-time1
  • LunaLock Pro$3.99
2 purchases

Domain Checker

One-time2
  • Domain Inspector Plus 50$0.99
  • Domain Inspector Pro 100$1.99

Questions

Is LunaLock free?
LunaLock is free to download, with in-app purchases available.
Is Domain Checker free?
Domain Checker is free to download, with in-app purchases available.
Do LunaLock or Domain Checker have ads?
Neither LunaLock nor Domain Checker shows ads.

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